Enter Right, Left, R1, Right, Circle as a password. If you entered the
code correctly, you will hear laughing.

Play as Bosses

Successfully complete the game once with any character. After Sweet Tooth
is defeated, save the game and watch your character's ending sequence. Then
all of the Bosses, including Crusher, Moon Buggy, Super Thumper, RC Car,
Super Axel, Super Slamm, Super Auger, Minion, and Sweet Tooth will be
unlocked.

Bonus Deathmatch Levels

Successfully complete any tournament mode level, then save the game to
unlock a deathmatch mode level. Each completed tournament level will unlock
a new deathmatch level.

Bonus Audio

Play track two of the game disc in an audio CD player to hear music by
Rob Zombie, Cirrus, Cypress Hill, Skold, Goulspoon, One Minute Silence, and
various voiceovers.